36. Male and female athletes have:A. The same Type I and Type II fiber size ratio.B.The same fiber Type distribution but different histochemical properties.C. The same fiber Type distribution and histochemical properties.D. The same size muscle fibers.

A. The same Type I and Type II fiber size ratio:Option A : This choice posits that male and female…

Answered: Male and female athletes have: A. The…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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The purpose of transverse tubules is to Select one: a. ensure a supply of glycogen throughout the muscle sarcoplasm b. conduct ATP molecules out of the mitochondria throughout the sarcoplasm c. ensure a supply of calcium ions through the muscle fibre d. rapidly conduct action potentials to the interior of the muscle fibre e. all of the other statements are correct
When ADP and Pi are bound to myosin in the cross-bridge cycle... (MULTIPLE SELECT) A. There is no force production and myosin is not bound to actin B. There is no force production and myosin is bound to actin C. There is force production and myosin is not bound to actin D. If its smooth muscle, a second phosphate might be bound to the light chain E. The cross-bridge is in a state of rigor mortis F. There is force production and myosin is bound to actin
A. nerve cell releases neurotransmitter which stimulates the muscle cell: B. calcium is released from sarcoplasmic reticulum and floods sarcoplasm; C. sarcolemma is permeable to sodium allowing sodium to rush into cell; D. myosin forms cross-bridges to pull actin into the center of the sarcomere; E. sarcolemma depolarizes and conducts an action potential Put them in order
Through dedicated training, the speed or level of effort coinciding with a person’s lactate threshold improves. Within the skeletal muscle cell, what changes might have occurred to permit this improved lactate threshold, resulting in less lactate spilling out into the blood?
Describe what is happening to the following parts of a sarcomere during muscle contraction. a. H band b. I band c. A band d. Z lines
17. Which of the following properties of the structure of skeletal muscle is not true? A. Comprised of individual cells. B. Have well defined striations. C. Have T-tubules. D. Communicate electrically through gap junction channels (connexins). E. Have well defined sarcomeric structure and extensive sarcoplasmic reticulum.
24. Which of the following is true concerning the role of Calcium in the contraction of muscle- cells? A. Smooth muscle cells contract in response to an extracellular inward-Calcium-current. B. Skeletal muscle cells contract in response to an extracellular inward-Calcium-current. C. Striated muscle cells contract in response to an extracellular inward-Calcium-current. D. No type of muscle cell requires an extracellular inward-Calcium current for normal C. contractile-function. D. Isotonic : Isometric
When the length of the muscle stays the same but the force increases during contraction it is referred to as an: A. Isotonic Contraction B. Isometric Contraction C. Isotreppid Contraction D. Isochronal Contraction
When a muscle fiber is stretched from 60% of its optimal length to Lo, what change or changes are happening on the cellular level (MULTIPLE SELECT)? A. Increased calcium release from the SR B. Increased firing of action potentials from the alpha motor neuron C. Increased rate of myosin ATPase activity D. Increased number of actin-myosin bridges E. Increased stretch on titin, producing more passive force
When a muscle hypertrophies what happens on the cellular level: Select one: a. Myosin and actin increase in number b. Sarcomeres increase in size c. Muscle fibers increase in number d. All of the above
Considering the Types of Skeletal Muscle Fibers, people that are naturally strong weight-Lifters are probably born with a higher percentage of Whereas a person that is naturally good at long-distance running, would probably be born with a higher percentage of, 31. olim A. Fast-twitch/white fibers : Slow-twitch/dark or red fibers B. Slow-twitch/dark or red fibers : Fast-twitch/white fibers C. Intermediate/green fibers : Tertiary Intermediate/purple fibers D. Tertiary Intermediate/purple fibers : Intermediate/green fibers 36 Seonbed is:
Muscle spindles trigger the muscle to a. lengthen. b. relax. c. shorten. d. remain fixed.

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Male and female athletes have: A. The same Type I and Type II fiber size ratio. B. The same fiber Type distribution but different histochemical properties. C. The same fiber Type distribution and histochemical properties. D. The same size muscle fibers.